Hot-blast stove



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F. E. KLING.

HOT BLAST STOVE. 4 APPLICATION FILED 1120.5,1921.

1,421,256. Patented June 27, 1922.

2 SHEETSSHEET I.

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QQOQM F. E. IKLING.

HOT BLAST STOVE APPLICATION .FILED DEC-5| 1921.

L42 1,256. Patented June 27,1922.

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ilhll'lfiifi TATE$ FRED E. KLING, OF YOUNGSTOW'N, OHIO.

HOT-BLAST STOVE. A I

Specification of Letters Patent. Pat ented June 27, 19 22 Application filed December 5, 1921. Serial No. 520,051.

T 0 all whom, it may concern:

Be it known that I, Finn) E. KLING, a citizen of the United States, and resident of Youngstown, in the county of Mahoning and State of Ohio, have invented certain new and useful Improvements in Hot-Blast Stoves, of which the following is a specification.

This invention relates to hot bl'ast stoves and more particularly to the bottom wall construction and support for said stoves, and has for its main object the provision of a novel form of stove bottom adapted to prevent the liftin of the outer edge of said bottom from tlie foundation or base when the stove is put in operation.

Another object is to provide a novel form of foundation or base for stoves of this class adapted to permit circulation of air under the bottom wall of the stove and also adapted to permit a man to enter under the stove to inspect and repair the bottom wall.

In the drawings, Figure 1 is a vertical elevation partly in section, of a stove embodying the invention.

Figure 2 is a sectional plan on the line IIII of Figure 1.

Figure 3 is a fragmentary sectional detail showing a modified form of furnace bot-tom.

Referring particularly to the drawings, the numeral 2 designates the base for the' stove, which is formed of concrete, masonry, or the like, and is provided with a plurality of upstanding piers 3 adapted to support the stove bottom. The piers 8 are of sufficient height and spaced sufficiently apart to permit a workman to crawl between the piers to inspect and repair the bottom wall of the furnace when desired, and such spacing of the piers also permits of a free circulation of air under the stove to cool the bottom wall.

The stove as a whole is of a well known design and comprises a cylindrical side wall composed of an outer metal shell 4 and a brick lining wall 5, a dome-shaped top composed of an outer metal shell portion 6 and inner brick wall 7, and a bottom wall composed of an outer metal shell 8 and inner brick wall 9. The shells 4c, 6, and 8 are all secured together by riveting or otherwise to form a rigid structure. and the brick lining walls 5, 7 and 9 are all built integral.

The usual checkerwork 10 and combust n chamber 11 are forme t e s the checkerwork' being supported on the usual arch 12 which forms the distributing chamber at the bottom of the stove. The eheckerwork is provided with the usual arched distributing channels 13 at its lower end adapted to evenly distribute the blast through the checkers.

A hot blast outlet and gas inlet 14; is formed in the side wall of the stove and communicates with, the combustion chamber 11,, and a cold blast inlet 15 is formed in the side wall of the stove and communicates with the distributing chamber with the lower end of the oheckerwork 10.

The chamber formed by the arch 12 also serves as an outlet for the burnt gases which pass through suitable passageways 16 to the fines leading to the stack, said flues being closed when the stove is in blast.

The top wall. composed of the shell portion 6 and brick lining 7 is so formed that a space 17 is left between the shell 6 and wall 7, therefore leaving room for expansion of the brick walls of the furnace when: it is heated. V

Heretofore it has been customary to build the bottom walls of hot blast stoves flat and when such stoves were put under blast, the force of the blast against the dome top has a tendency to pull or lift the stove, and the forces thus developed were communicated through the side shell to the bottom wall and shell which were lifted or bent upwardly, the shell being distorted and often broken. The bottom wall and shell were lifted or bent in the form of an annulus. That is, the central portion remained stationary and fiat while an outer rim-like portion was lifted or bent upwardly, the inner line of the bend being defined approximately by the line of equilibrium. The line of equilibrium is located around the bottom wall of the stove where the weight of the interior brick work counterbalances the upward or lifting force of the blast. Usually this line is within the brick side wall adjacent its inner face, that is, fifteen to twenty inches inward from the side wall shell.

In the present construction the stove is provided with a flat central portion 20 and an outer annulus or rim portion 21 which projects upwardly on an angle from a point slightly beyond the line of equilibrium so as to provide a stronger bottom wall adapted to resist the upward lifting forces of the blast, due to the portion 21 which is already in its elevated position, and further movement would have to come from the flat portion of the wall which is counterbalanced by the interior brickwork of the furnace.

In Figure 3 the bottom wall is shown with an outer annulus or rim 21 which is curved upwardly instead of being projected upwardly on a straight angle as in Figure 1. The effects of this construction are substantially thesame as that of Figure 1.

It will be understood that I do not wish to be limited. to any specific design of hot blast stove since my improved bottom con struction may be adapted to the various approved designs of stoves now in use.

I claim: 7 1. A hot blast stove comprising a cylindrical side wall portion, a closed top portion,

and a bottom wall, said bottom wall having an outer rim portion projecting upwardly on an angle to the remainder of said bottom;

2. A hot blast stove comprising a cylindrical side wall portion, a top wall portion, and a bottom wall, said walls being composed of an outer shell of metal and an inner lining of brick, said metal shells for said walls being secured together, and said bottom wall shell being provided with an outer rim portion projecting upwardly on an angle to the remainder of said bottom, so that said bottom shell approximates a cone shape.

8. A hot blast stove comprising a cylin drical side wall portion, a top wall portion, and a bottom wall, said walls being composed of an outer shell of metal and an inner lining of brick, said metal shells for said walls being secured together, and said bottom wall shell being provided with an outer rim portion projecting upwardly on an angle to the remainder of said bottom, so that said bottom shell approximates a cone shape, and a base for supporting said stove, said base being shaped to follow the angularity of said bottom wall and therefore firmly support the same.

4:. A hot blast stove comprising a cylindrical side wall portion, a dome-shaped top wall portion, and a bottom wall, said walls being composed of an outer shell of metal and an inner lining of brick, said metalshells for said walls being secured together, said bottom wall shell being provided with an outer annulus projecting upwardly on an angle from a point slightly within the line of the inside face of the side wall, and means for supporting said base.

5. A hotblast stove comprising a cylindrical side wall portion, a dome-shaped top wallportion, and a bottom wall, said walls being composed of an outer shell of metal and an inner lining of brick, said metal shells for said walls being secured together, said bottom wall shell being provided with an outer annulus projecting upwardly on an angle from a point slightly within the line oi' equilibrium as defined in the specification, and a base for said stove having a plurality of piers extending upwardly there from for supporting the bottom wall of said stove, said piers being spaced apart to provide for the clrculatlon of an under said furnace and to permit inspection of said bottom wall.

In testimony whereof I have hereunto set my hand.

FRED, E. KLING. 

